Sprinkler Irrigation for Small Farms

When does sprinkler irrigation make sense?

Sprinklers suit pasture, hay, cover crops, and large plantings where laying drip line would take too long. They also help establish seed and cool crops in hot weather. They are less suited to plants that stay healthier with dry leaves, since wet foliage can encourage some diseases.

Think about how often you will move the equipment. A permanent or semi-permanent layout takes more time to install but less to run each week.

Pasture and hay ground often benefit from irrigation mostly during dry spells, so think about whether you need a full system or equipment you can bring out only when needed. A smaller investment may match how you actually farm.

What types of sprinkler systems can a small farm use?

Small operations commonly choose among a few styles, and each trades labor for equipment cost. Ask suppliers and your extension office what is common in your area.

Whatever you choose, the maker's performance data for each sprinkler head matters more than the look of the head.

Compare how many hours of labor each style needs per week against what you can really give. A cheap portable system that nobody has time to move ends up sitting in the barn.

• Portable hand-move lines, cheaper to buy and more work to shift
• Solid-set lines left in place for a season, less labor once installed
• Traveling or rotating big-gun units for larger fields
• Lawn-style pop-ups for small gardens and turf

How do you check that water is spread evenly?

Uniformity means every part of the field gets about the same water. Poor uniformity wastes water and leaves dry and soggy patches. A common field check uses a set of identical catch cans or straight-sided containers set out in a grid, then run the system for a set time and compare the depth in each.

Extension publications describe the method in detail. Large differences between cans point to problems with spacing, pressure, worn nozzles, or wind.

Pumps and power deserve thought before you buy sprinklers. The pump has to deliver the flow and pressure the heads need at the far end of the line, and an undersized pump gives poor coverage everywhere. A qualified irrigation dealer or your extension office can check the match.

How does wind affect a sprinkler pattern?

Wind pushes droplets downwind and shortens throw on the upwind side. In breezy conditions you may see stripes of dry and wet. Many growers irrigate during calmer hours, often early morning or late evening, and tighten spacing in windy fields.

Watching the pattern on a typical day tells you more than any chart. If the spray is drifting off the field, shorten the run or wait.

Heads with a low trajectory throw a flatter stream under the wind, while high-angle heads reach farther in still air. Ask the supplier what the maker recommends for breezy sites.

What maintenance keeps sprinklers accurate?

Nozzles wear and enlarge over time, and clogs and bent risers distort the spray. A quick check of each head at the start of the season catches most problems. Look at pressure, too: too high creates fine mist that blows away, and too low gives big drops and poor spread.

Flush mainlines when you start up, drain them before freezing weather, and store portable pipe off the ground.

Safety matters with portable pipe. Aluminum pipe can conduct electricity if it touches an overhead power line while you carry it, so look up before you lift and keep pipe well clear of lines. Have a licensed electrician handle any pump wiring.

• Replace worn or damaged nozzles
• Straighten risers so heads stand level
• Check pressure at the farthest sprinkler
• Clean intake screens and filters

How much water should you apply?

The answer depends on soil, crop, weather, and system output. Measure what your sprinklers actually put down with catch cans, and compare it to the infiltration of your soil. If water runs off or puddles, shorten the cycle and repeat later so it can soak in.

Your county extension office can help you find soil data and crop water guidance for your region.

Keep a notebook with each field's run time, the date, and what the catch cans showed. Over a season you will see which fields need adjustment and which are fine.

What about water rights and well limits?

Water use for irrigation can be regulated, and the rules are local and vary by state and sometimes by watershed. Before you plan a system that pulls from a stream, pond, or well, ask your state water resources office and your county extension office what permits, registrations, or limits apply.

Last reviewed: November 12, 2026. Written by the Homestead & Small Farm Editorial Team. See our editorial policy.